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Castries vs Porto
Comparing Castries change · Porto change
Castries is the warmer of the two — about 22°F on the annual average; Castries is the wetter, with 34 in more rain a year.
How the seasons compare
The differences between Castries and Porto, in everyday terms.
Summers
Castries has much hotter summers
Castries: Warm
Porto: Mild
Winters
Castries has far milder winters
Castries: Stays warm
Porto: Cool
Rain & snow
Castries is wetter
Castries: Very wet
Porto: Wet
Sky
Similar amounts of sun
Castries: Fairly sunny
Porto: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 22°F on the annual average.
Precipitation
Castries is the wetter — about 34 in more across the year.
Clear skies
The two cities see a similar amount of sun.
Exact monthly numbers
Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.
Avg high (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Porto | 57 | 59 | 63 | 65 | 69 | 73 | 75 | 77 | 74 | 70 | 62 | 59 |
| Difference | -23 | -21 | -18 | -17 | -14 | -10 | -8 | -7 | -10 | -14 | -20 | -23 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Porto | 57 | 59 | 63 | 65 | 69 | 73 |
| Difference | -23 | -21 | -18 | -17 | -14 | -10 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Porto | 75 | 77 | 74 | 70 | 62 | 59 |
| Difference | -8 | -7 | -10 | -14 | -20 | -23 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Porto | 43 | 44 | 47 | 49 | 53 | 57 | 59 | 59 | 57 | 54 | 48 | 45 |
| Difference | -35 | -34 | -31 | -30 | -27 | -24 | -22 | -23 | -25 | -28 | -33 | -34 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Porto | 43 | 44 | 47 | 49 | 53 | 57 |
| Difference | -35 | -34 | -31 | -30 | -27 | -24 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Porto | 59 | 59 | 57 | 54 | 48 | 45 |
| Difference | -22 | -23 | -25 | -28 | -33 | -34 |
Precipitation (in) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Porto | 5.8 | 3.5 | 4.1 | 3.9 | 3.4 | 1.2 | 0.5 | 1.1 | 2.6 | 5.4 | 6.3 | 5.8 |
| Difference | +1.3 | +0.5 | +1.5 | +0.4 | -1 | -4 | -8 | -10.4 | -6.2 | -4.3 | -3.2 | -0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Porto | 5.8 | 3.5 | 4.1 | 3.9 | 3.4 | 1.2 |
| Difference | +1.3 | +0.5 | +1.5 | +0.4 | -1 | -4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Porto | 0.5 | 1.1 | 2.6 | 5.4 | 6.3 | 5.8 |
| Difference | -8 | -10.4 | -6.2 | -4.3 | -3.2 | -0.1 |
Cloud cover (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Porto | 58 | 53 | 54 | 56 | 53 | 45 | 35 | 36 | 43 | 53 | 56 | 59 |
| Difference | +20 | +14 | +12 | +7 | +1 | -14 | -14 | -10 | -8 | +2 | +10 | +18 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Porto | 58 | 53 | 54 | 56 | 53 | 45 |
| Difference | +20 | +14 | +12 | +7 | +1 | -14 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Porto | 35 | 36 | 43 | 53 | 56 | 59 |
| Difference | -14 | -10 | -8 | +2 | +10 | +18 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Porto | 85 | 83 | 81 | 80 | 78 | 75 | 73 | 72 | 74 | 79 | 83 | 85 |
| Difference | +9 | +8 | +6 | +4 | +1 | -3 | -6 | -7 | -4 | — | +4 | +8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Porto | 85 | 83 | 81 | 80 | 78 | 75 |
| Difference | +9 | +8 | +6 | +4 | +1 | -3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Porto | 73 | 72 | 74 | 79 | 83 | 85 |
| Difference | -6 | -7 | -4 | — | +4 | +8 |
How both climates are changing
Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Castries trends → · Porto trends →
Methodology & sources
Castries
Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Precipitation — 1991–2020 normals computed from 10 years of daily observations at LE Lamentin, a weather station, about 66 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.
Porto
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Porto, a weather station, about 13 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.
← change Castries · change Porto → · Castries page · Porto page